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US 2,316,189 A · Inventors: SCHAEFER TIMOTHY A

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Granted April 13, 1943. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by April 13, 1960.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledFebruary 16, 1942
GrantedApril 13, 1943
Term endedApril 13, 1960
Application number—
Classification (CPC)—
Length4 pages

Timeline

Timeline From USPTO dates

194319451947194919511953195519571959Application filedFeb 16, 1942Patent grantedApril 13, 1943Term endedApril 13, 1960

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

Everything on this page comes from the USPTO record linked above.